GenerateBlocks Break on real page until I clear History.

I use GenerateBlocks and create a Block for my website. But When I show new post with the Block, the block broke and shows only plain text instead of any design like background color, padding, color, etc. When I delete my browser history, it shows right.

When I open the page on new browser it works, but when I open the page 2nd time on any browser, it broke.